/* Design Tokens & CSS Variables */
:root {
  /* Colors */
  --bg: hsl(228, 12%, 8%);
  --glow-x: 20%;
  --glow-y: 20%;
  --surface: hsl(228, 12%, 12%);
  --surface-raised: hsl(228, 12%, 18%);
  --border: hsl(228, 12%, 16%);
  
  --primary: hsl(263, 70%, 55%);
  --secondary: hsl(320, 80%, 55%);
  --accent-gradient: linear-gradient(135deg, var(--primary), var(--secondary));
  
  --text: hsl(228, 12%, 85%);
  --text-heading: hsl(0, 0%, 98%);
  --text-muted: hsl(228, 12%, 60%);
  
  --genius: hsl(142, 75%, 45%);
  --genius-bg: hsla(142, 75%, 45%, 0.1);
  --overrated: hsl(346, 80%, 55%);
  --overrated-bg: hsla(346, 80%, 55%, 0.1);

  /* Spacing (8px Base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;

  /* Fonts */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 250ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Modern Web Standards: Color Scheme & Scrollbar */
  color-scheme: dark;
  scrollbar-color: var(--border) transparent;
  scrollbar-width: thin;
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg);
  background-image: 
    radial-gradient(circle at var(--glow-x, 20%) var(--glow-y, 20%), rgba(99, 102, 241, 0.05) 0%, transparent 45%),
    radial-gradient(circle at calc(100% - var(--glow-x, 20%)) calc(100% - var(--glow-y, 20%)), rgba(236, 72, 153, 0.05) 0%, transparent 45%);
  background-attachment: fixed;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Text Gradients */
.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Scrollbars */
@supports not (scrollbar-color: auto) {
  ::-webkit-scrollbar {
    width: 6px;
    height: 6px;
  }
  ::-webkit-scrollbar-track {
    background: transparent;
  }
  ::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: var(--space-2);
  }
  ::-webkit-scrollbar-thumb:hover {
    background: var(--surface-raised);
  }
}

/* Floating Navbar */
.navbar {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  height: 64px;
  background: rgba(18, 22, 33, 0.75);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  z-index: 100;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  position: relative;
}

.logo-glow {
  position: absolute;
  width: 40px;
  height: 40px;
  background: var(--primary);
  filter: blur(20px);
  opacity: 0.5;
  border-radius: 50%;
  left: -10px;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.03em;
  z-index: 1;
}

.version-tag {
  font-size: 0.65rem;
  font-weight: 700;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
}

/* Status Indicator */
.status-indicator {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  padding: var(--space-1) var(--space-3);
  border-radius: 99px;
  white-space: nowrap;
  flex-shrink: 0;
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 8px #10b981;
}

.status-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: #10b981;
}

/* Grid Dashboard Layout */
.dashboard-grid {
  margin-top: 96px;
  padding: var(--space-4);
  flex-grow: 1;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-4);
  height: calc(100vh - 116px);
  max-width: 1440px;
  width: 100%;
  align-self: center;
}

/* Common Panels */
.sidebar-panel, .main-panel {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--space-4);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.panel-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--text-heading);
  font-weight: 600;
}

.section-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.scroll-container {
  overflow-y: auto;
  flex-grow: 1;
  padding: var(--space-3);
}

/* Sidebar List Item */
.trend-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--space-3);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text);
  text-decoration: none;
  margin-bottom: var(--space-2);
  transition: var(--transition-fast);
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.trend-item:hover {
  background: var(--surface-raised);
  border-color: var(--border);
  transform: translateY(-1px);
}

.trend-item.active {
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.4);
}

.trend-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.trend-item-title {
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--text-heading);
}

.trend-item-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  max-width: 190px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.trend-item-traffic {
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 6px;
  color: var(--primary);
  white-space: nowrap;
}

.trend-item.active .trend-item-traffic {
  background: rgba(99, 102, 241, 0.2);
  border-color: rgba(99, 102, 241, 0.4);
  color: var(--text-heading);
}

/* Skeletons */
.skeleton-item {
  height: 54px;
  background: linear-gradient(90deg, var(--surface) 25%, var(--surface-raised) 50%, var(--surface) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: var(--space-3);
  margin-bottom: var(--space-2);
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Empty State / Welcome Screen */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-grow: 1;
  padding: var(--space-8);
  text-align: center;
  max-width: 450px;
  align-self: center;

  /* Modern Discrete Transitions */
  opacity: 1;
  transform: translateY(0) scale(1);
  transition:
    display 0.35s,
    opacity 0.35s ease-out,
    transform 0.35s ease-out;
  transition-behavior: allow-discrete;
}

@starting-style {
  .empty-state {
    opacity: 0;
    transform: translateY(10px) scale(0.98);
  }
}

.empty-state.hidden {
  display: none;
  opacity: 0;
  transform: translateY(10px) scale(0.98);
}

.empty-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: var(--space-4);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: var(--space-4);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.1);
}

.empty-state h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: var(--space-2);
}

.empty-state p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Explainer Details Board */
.explainer-container {
  overflow-y: auto;
  flex-grow: 1;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);

  /* Modern Discrete Transitions */
  opacity: 1;
  transform: translateY(0);
  transition:
    display 0.35s,
    opacity 0.35s ease-out,
    transform 0.35s ease-out;
  transition-behavior: allow-discrete;
}

@starting-style {
  .explainer-container {
    opacity: 0;
    transform: translateY(15px);
  }
}

.explainer-container.hidden {
  display: none;
  opacity: 0;
  transform: translateY(15px);
}

.trend-hero-card {
  background: linear-gradient(180deg, rgba(18, 22, 33, 0.8) 0%, rgba(18, 22, 33, 0) 100%);
  border-bottom: 1px solid var(--border);
  padding-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.trend-meta-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.velocity-pill {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(236, 72, 153, 0.08);
  border: 1px solid rgba(236, 72, 153, 0.2);
  color: var(--secondary);
  padding: 4px 10px;
  border-radius: 6px;
  white-space: nowrap;
}

.velocity-dot {
  width: 6px;
  height: 6px;
  background-color: var(--secondary);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--secondary);
}

.traffic-pill {
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--accent-gradient);
  color: var(--text-heading);
  padding: 4px 10px;
  border-radius: 6px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
  outline: none;
  font-family: var(--font-body);
}

.share-btn:hover {
  background: rgba(99, 102, 241, 0.18);
  border-color: var(--primary);
  color: var(--text-heading);
}

.share-btn.copied {
  background: rgba(16, 185, 129, 0.1);
  border-color: #10b981;
  color: #10b981;
}

.share-icon {
  flex-shrink: 0;
}

.trend-title {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--text-heading);
  letter-spacing: -0.03em;
}

/* The Hook Card */
.hook-box {
  background: rgba(99, 102, 241, 0.04);
  border-left: 3px solid var(--primary);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--space-3) var(--space-3) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  width: 100%;
}

.hook-badge {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--primary);
}

#detail-hook {
  font-size: 1.05rem;
  color: var(--text-heading);
  font-weight: 500;
  line-height: 1.5;
}

/* Cards Grid */
.explainer-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.glass-card {
  background-color: rgba(18, 22, 33, 0.4);
  border: 1px solid var(--border);
  border-radius: var(--space-4);
  padding: var(--space-4) var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--surface-raised);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.full-width {
  grid-column: 1 / -1;
}

.card-heading {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text-heading);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.card-icon {
  color: var(--primary);
}

.card-text {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.6;
}

/* Tags Container */
.tag-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-1);
}

.viral-tag {
  background-color: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text);
  padding: var(--space-2) var(--space-4);
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.viral-tag::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary);
}

/* Interactive Grid */
.interactive-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-4);
}

.interactive-card {
  min-height: 250px;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

/* Poll Styles */
.poll-prompt {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.poll-buttons {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.poll-btn {
  flex: 1;
  padding: var(--space-3) var(--space-2);
  border-radius: var(--space-3);
  border: 1px solid var(--border);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition-fast);
  outline: none;
  font-family: var(--font-body);
}

.vote-genius {
  background: var(--genius-bg);
  color: var(--genius);
  border-color: rgba(16, 185, 129, 0.2);
}

.vote-genius:hover {
  background: rgba(16, 185, 129, 0.18);
  border-color: var(--genius);
  transform: translateY(-1px);
}

.vote-overrated {
  background: var(--overrated-bg);
  color: var(--overrated);
  border-color: rgba(244, 63, 94, 0.2);
}

.vote-overrated:hover {
  background: rgba(244, 63, 94, 0.18);
  border-color: var(--overrated);
  transform: translateY(-1px);
}

.poll-btn:active {
  transform: scale(0.97);
}

/* Poll Results Progress Bars */
.poll-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  font-size: 0.8rem;
  font-weight: 600;
}

.result-label {
  width: 70px;
  color: var(--text-muted);
}

.progress-bar-wrap {
  flex-grow: 1;
  height: 8px;
  background-color: var(--surface-raised);
  border-radius: 99px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.progress-bar {
  height: 100%;
  border-radius: 99px;
  transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.bar-g {
  background: var(--genius);
  box-shadow: 0 0 8px var(--genius);
}

.bar-o {
  background: var(--overrated);
  box-shadow: 0 0 8px var(--overrated);
}

.result-pct {
  width: 40px;
  text-align: right;
  color: var(--text-heading);
}

/* Chat Styles */
.chat-history-container {
  flex-grow: 1;
  background-color: rgba(18, 22, 33, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--space-3);
  padding: var(--space-3);
  overflow-y: auto;
  max-height: 160px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.chat-bubble {
  font-size: 0.78rem;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--space-3);
  max-width: 85%;
  line-height: 1.4;
  word-break: break-word;
  
  /* Modern Visual Micro-Animations */
  opacity: 0;
  transform: translateY(10px);
  animation: bubble-slide-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes bubble-slide-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chat-bubble.bot {
  background-color: var(--surface-raised);
  color: var(--text);
  align-self: flex-start;
  border: 1px solid var(--border);
  border-bottom-left-radius: 2px;
}

.chat-bubble.user {
  background-color: var(--primary);
  color: var(--text-heading);
  align-self: flex-end;
  border-bottom-right-radius: 2px;
}

.chat-input-form {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

#chat-input {
  flex-grow: 1;
  background-color: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--space-3);
  padding: 0 var(--space-4);
  height: 38px;
  font-size: 0.82rem;
  color: var(--text-heading);
  outline: none;
  transition: var(--transition-fast);
  font-family: var(--font-body);
}

#chat-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.2);
}

#chat-submit-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--space-3);
  background: var(--accent-gradient);
  border: none;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  outline: none;
  transition: var(--transition-fast);
}

#chat-submit-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

#chat-submit-btn:active {
  transform: scale(0.95);
}

/* News Context Footer */
.news-footer-card {
  background: rgba(18, 22, 33, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--space-4);
  padding: var(--space-4) var(--space-5);
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  margin-top: var(--space-2);
}

.news-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--space-3);
  background: var(--surface-raised);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.news-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-1);
}

.news-headline {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-heading);
}

.news-snippet {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: var(--space-2);
}

.news-link-btn {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-heading);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid var(--border);
  background: var(--surface-raised);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--space-2);
  transition: var(--transition-fast);
}

.news-link-btn:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.link-arrow {
  transition: transform var(--transition-fast);
}

.news-link-btn:hover .link-arrow {
  transform: translate(1px, -1px);
}

/* Helpers */
.hidden {
  display: none;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
    height: auto;
    overflow-y: visible;
  }
  
  .sidebar-panel {
    height: 300px;
  }
  
  .main-panel {
    min-height: 500px;
  }
  
  .explainer-grid, .interactive-grid {
    grid-template-columns: 1fr;
  }
}

/* Modern Web Practice Guidance Focus Styles */
.poll-btn:focus-visible,
#chat-submit-btn:focus-visible,
#chat-input:focus-visible,
.trend-item:focus-visible,
.news-link-btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.trend-item:focus-visible {
  outline-offset: -2px; /* Inset to fit card borders nicely */
}

/* Accessibility: High-contrast scrollbars override */
@media (prefers-contrast: more) {
  .scroll-container, .chat-history-container {
    --scrollbar-thumb: hsl(0, 0%, 100%);
    --scrollbar-track: hsl(0, 0%, 0%);
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
  }
}

/* Reduced Motion Override for Discrete Transitions */
@media (prefers-reduced-motion: reduce) {
  .empty-state, .explainer-container {
    transform: none !important;
    transition-duration: 0.1s !important;
  }
  @starting-style {
    .empty-state, .explainer-container {
      transform: none !important;
    }
  }
  .empty-state.hidden, .explainer-container.hidden {
    transform: none !important;
  }
}